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A water-soluble, highly-fluorescent complexing reagent, consisting of two diazapyrenium subunits linked by a meta-xylene spacer, binds nucleotides as nonfluorescent, but photolabile, 1 : 1 complexes in which the substrate is sandwiched between the diazapyrenium subunits.
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Coudret et al. (1992) studied this question.
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